The
model presented in this module is adapted from David Meister's,
Human Factors: Theory and Practice, 1971, and is one depiction
of how humans and systems interact. Environmental influences on
that interaction have been added. The model illustrates a
typical information flow between the "human" and "machine"
components of a system. This model will be used to introduce
all of the other course modules.

Automated/Machine
System

Human
System

*
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information.